Active clinical trials for "Coronary Artery Disease"

To investigate the relationship between endogenous estrogen and androgen levels and risk of coronary heart disease among postmenopausal women in the Women's Health Initiative-Observational Study (WHI-OS).

This study will measure and compare the levels of endothelial progenitor cells (EPCs) in the blood of people with and without risk factors for atherosclerosis (hardening of the arteries) to see if there is a relationship between these cells and cardiovascular risk factors such as smoking, high cholesterol level and high blood pressure. Healthy male volunteers between the ages of 21 and 55 years with and without heart disease risk factors may be eligible for this study. Candidates must have no evidence of coronary or peripheral vascular disease, proliferative retinopathy, or other chronic disease and no history of cancer, migraine-type headache, cluster headache, raised intraocular pressure, raised intracranial pressure, hyperthyroidism. Participants will undergo the following procedures at the NIH Clinical Center: Medical history and physical examination Blood tests to measure EPC level and various risk and growth factors Brachial reactivity study - This ultrasound study tests how well the subject's arteries widen. The subject rests on a bed for 30 minutes. An ultrasound measuring device is placed over the artery just above the elbow. The size of the artery and blood flow through it are measured before and after inflating a pressure cuff around the forearm. The pressure cuff stops the flow of blood to the arm for a few minutes. After a 15-minute rest, the drug nitroglycerin is sprayed under the subject's tongue. Before the nitroglycerin spray and 3 minutes after it, the size of the artery and blood flow through it are measured again.

To determine familial and non-familial causes for susceptibility to atherosclerosis and the inflammatory response.

To explore the immune/inflammatory processes as pathways between depression/exhaustion and coronary artery disease (CAD) progression.

PROSPECT is a multi-center prospective registry of Acute Coronary Syndromes (ACS) patients with single or double vessel coronary artery disease. Approximately 700 patients with ACS will be enrolled into the study at sites in the United States and European Union.

Background: Myocardial fibrosis is a major component in cardiac remodeling in patients with myocardial infarction or hibernation. However, the association of cardiac fibrosis and coronary artery disease (CAD) in patients without infarction or hibernation is still unclear. In the present study, we analyzed the relationship between serum concentrations of procollagen propeptides and severity of CAD in such patients. Patients and methods: Forty-six patients (32 men and 14 woman; mean age 64 years) with chest pain and normal left ventricular contractility were enrolled into this study. Myocardial infarction was excluded by history and electrocardiograms. All patients received stress thallium-201 single photon emission computed tomography (SPECT) and analysis of the serum levels of the aminoterminal propeptide of type I and III procollagen (PINP and PIIINP).

To define factors contributing to coronary heart disease (CHD) in high risk families.

To determine if risk factors measured in childhood can predict the development of atherosclerotic coronary and carotid artery disease in adulthood.

To conduct a randomized controlled trial to evaluate the effectiveness of an intervention to reduce dietary fat.

To evaluate the effectiveness of primary prevention of coronary heart disease risk factors by examining data from the National Health Examination Survey (NHES) and the National Health and Nutrition Examination Surveys (NHANES) to determine whether more recent birth cohorts were attaining lower blood pressure and cholesterol levels than earlier birth cohorts.